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* Only show the "dropdown" when there is a menu. Note that this uses a `:not()` selector, but it is supported in browsers that support media queries so it is safe to use here. * Make the header shorter when on particularly narrow screens, which also tend to be shorter. * Don't restrict the height of images in the attachment details modal, to take advantage of all available space. fixes #29339. Built from https://develop.svn.wordpress.org/trunk@29632 git-svn-id: http://core.svn.wordpress.org/trunk@29406 1a063a9b-81f0-0310-95a4-ce76da25c4cd